[Merge] ~enr0n/ubuntu/+source/systemd:ubuntu-kinetic-merge-251.2-2 into ~ubuntu-core-dev/ubuntu/+source/systemd:ubuntu-kinetic

[Lukas Märdian]

Sorry for taking a long time to review this!
* The sources match the upstream-stable v251.2 tag & orig tarball.
* The debian/ changes LGTM overall, I have a few remarks below, that we could/should improve upon.
* PPA build is looking fine: https://launchpad.net/~enr0n/+archive/ubuntu/systemd-251

#0 PPA autopkgtests are looking good so far, have there been any test against all the affected packages, to notify them (or at least the 'main' packages) about any fallout?
https://autopkgtest.ubuntu.com/results/autopkgtest-kinetic-enr0n-systemd-251/?format=plain

#1 d/patches/hwdb-implement-root-option-for-systemd-hwdb-query.patch, debian/patches/sd-hwdb-add-sd_hwdb_new_from_path.patch, please mention the upstream commit/fix in patch headers, e.g. using the "Forwarded:" DEP-3 header. It's not clear at first glance that this is a cherry-pick, missing any reference.

#2 d/patches/test-deny-TEST-29-PORTABLE-again.patch: is this needed for all architectures? We used to disable it on ppc64el only in the past, IIRC.

#3 d/control: Package: systemd-oomd => Is "Section: admin" needed? It is dropped in Debian and seems like unnecessary Ubuntu delta.

#4 d/patches/test-install-libgcc_s.so.1-for-TEST-70-TPM2.patch: please add some DEP-3 headers for this new patch. At least a bug reference and/or upstream fix. So we can easily decide when is the correct time to drop that again in the future.

#5 d/libsystemd0.symbols: Fix lintian error about version string, using "~" as suggested.
E: libsystemd0: symbols-file-contains-current-version-with-debian-revision on symbol sd_hwdb_new_from_path at LIBSYSTEMD_251 (libsystemd.so.0) [symbols]
N: 
N:   Debian revisions should be stripped from versions in symbols files. Not
N:   doing so leads to dependencies unsatisfiable by backports (1.0-1~bpo <<
N:   1.0-1 while 1.0-1~bpo >= 1.0). If the Debian revision can't be stripped
N:   because the symbol really appeared between two specific Debian revisions,
N:   you should postfix the version with a single "~" (example: 1.0-3~ if the
N:   symbol appeared in 1.0-3).
N:   
N:   This problem normally means that the symbols were added automatically by
N:   dpkg-gensymbols. dpkg-gensymbols uses the full version number for the
N:   dependency associated to any new symbol that it detects. The maintainer
N:   must update the debian/<package>.symbols file by adding the new symbols
N:   with the corresponding upstream version.

#6 d/control: dh-sequence-package-notes >= 0.8 (Doesn't work with the Jammy version) – Not sure if it's worth introducing Ubuntu delta for this, though. As the people building systemd isn't too big and people are usually in the known.

#7 Debian's 251.2-6 seems to have some interesting changes (features & fixes), but we can do a smaller merge later in the cycle to get those included.
-- 
https://code.launchpad.net/~enr0n/ubuntu/+source/systemd/+git/systemd/+merge/425171
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